Record Display for the EPA National Library Catalog

RECORD NUMBER: 42 OF 68

OLS Field Name OLS Field Data
Main Title Mathematical Modeling of Nutrient - Transport.
Author DiGian, Francis A. ;
CORP Author Massachusetts Univ., Amherst. Water Resources Research Center.
Year Published 1971
Report Number Pub-17; OWRR-B-005-MASS; 01121,; B-005-MASS(3)
Stock Number PB-225 127
Additional Subjects ( Nutrients ; Mass transfer) ; ( Water chemistry ; Mass transfer) ; Mathematical models ; Dredging ; Surface waters ; Sediment transport ; Deposits ; Diffusion ; Porosity ; Turtuosity ; Algae ; Sterilization ; Sediment water interactions
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-225 127 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 40p
Abstract
The derivation of the mathematical models for nutrient transport in deposit-water systems is based upon the mode of physical mass transfer via diffusion and adsorption. The two primary objectives in seeking a simple but valid model of the system are: To obtain a physical system constant, i.e. an 'effective' diffusion coefficient which can be used to estimate the flux of nutrients through the deposit and the depth of penetration; and to examine the rate-limiting step(s) of nutrient transport by modeling the interplay of 'interfacial resistance' and pore diffusion and adsorption. The models described are: Pore diffusion through interstitial water of deposit; interfacial mass transport; diffusion with simultaneous adsorption; and release of nutrients via diffusion. This last model of simultaneous adsorption and diffusion may be most useful in gaining an understanding of nutrient interchange.